In 2022,Ma, Yu-Hong; He, Xiao-Yu; Wang, Long; Yang, Qing-Qing published an article in Journal of Organic Chemistry. The title of the article was 《PPh3-Triggered Tandem Synthesis of 2,3-Disubstituted Benzofuran Derivatives from o-Quinone Methides with Acyl Chlorides》.COA of Formula: C4H5ClO3 The author mentioned the following in the article:
A PPh3-triggered tandem strategy for the efficient synthesis of valuable 2,3-disubstituted benzofuran derivatives in generally good to high yields from aryl or alkyl acyl chlorides and o-quinone methides has been developed. This method features mild reaction conditions, simple operation, and a broad substrate scope.Ethyl oxalyl monochloride(cas: 4755-77-5COA of Formula: C4H5ClO3) was used in this study.
Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. In the laboratory, acyl chlorides are generally prepared by treating carboxylic acids with thionyl chloride (SOCl2). The reaction is catalyzed by dimethylformamide and other additives.COA of Formula: C4H5ClO3
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics